scholarly journals Efficient hydrogen release from perhydro-N-ethylcarbazole using catalyst-coated metallic structures produced by selective electron beam melting

2015 ◽  
Vol 8 (2) ◽  
pp. 641-649 ◽  
Author(s):  
W. Peters ◽  
M. Eypasch ◽  
T. Frank ◽  
J. Schwerdtfeger ◽  
C. Körner ◽  
...  
Keyword(s):  
Electron Beam ◽  
Rapid Prototyping ◽  
Continuous Flow ◽  
Electron Beam Melting ◽  
Hydrogen Release ◽  
Metallic Structures ◽  
Selective Electron Beam Melting

Perhydro-N-ethyl carbazole is dehydrogenated in continuous flow using a reactor produced by rapid prototyping, releasing hydrogen equivalent to 4.32 kWel L−1.

Assessing Porosity in Selective Electron Beam Melting Manufactured Ti–6Al–4V by Nonlinear Impact Modulation Spectroscopy

2020 ◽  
Vol 39 (4) ◽  
Author(s):  
Jan Kober ◽  
Alexander Kirchner ◽  
Alena Kruisova ◽  
Milan Chlada ◽  
Sigrun Hirsekorn ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Melting ◽  
Modulation Spectroscopy ◽  
Selective Electron Beam Melting

Molten pool behavior and effect of fluid flow on solidification conditions in selective electron beam melting (SEBM) of a biomedical Co-Cr-Mo alloy

2019 ◽  
Vol 26 ◽  
pp. 202-214 ◽  
Author(s):  
Yufan Zhao ◽  
Yuichiro Koizumi ◽  
Kenta Aoyagi ◽  
Daixiu Wei ◽  
Kenta Yamanaka ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fluid Flow ◽  
Molten Pool ◽  
Electron Beam Melting ◽  
Selective Electron Beam Melting

Selective electron beam melting of NiTi: Microstructure, phase transformation and mechanical properties

2019 ◽  
Vol 744 ◽  
pp. 290-298 ◽  
Author(s):  
Quan Zhou ◽  
Muhammad Dilawer Hayat ◽  
Gang Chen ◽  
Song Cai ◽  
Xuanhui Qu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
Electron Beam ◽  
Electron Beam Melting ◽  
Selective Electron Beam Melting

scholarly journals Nanoscaled eutectic NiAl-(Cr,Mo) composites with exceptional mechanical properties processed by electron beam melting

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Andreas Förner ◽  
S. Giese ◽  
C. Arnold ◽  
P. Felfer ◽  
C. Körner ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Electron Beam Melting ◽  
Lamellar Microstructure ◽  
High Hardness ◽  
Additive Process ◽  
In Situ Composites ◽  
Selective Electron Beam Melting ◽  
Very High

Abstract Eutectic NiAl-(Cr,Mo) composites are promising high temperature materials due to their high melting point, excellent oxidation behavior and low density. To enhance the strength, hardness and fracture toughness, high cooling rates are beneficial to obtain a fine cellular-lamellar microstructure. This can be provided by the additive process of selective electron beam melting. The very high temperature gradient achieved in this process leads to the formation of the finest microstructure that has ever been reported for NiAl-(Cr,Mo) in-situ composites. A very high hardness and fracture toughening mechanisms were observed. This represents a feasibility study towards additive manufacturing of eutectic NiAl-(Cr,Mo) in-situ composites by selective electron beam melting.

Microgeometry of the surface of electron beam additive manufacturing products. Selective electron beam melting

2021 ◽  
pp. 408-418
Author(s):  
E.V. Krasnova ◽  
Yu.A. Morgunov ◽  
B.P. Saushkin
Keyword(s):  
Electron Beam ◽  
Additive Manufacturing ◽  
Physical Model ◽  
Electron Beam Melting ◽  
Metallurgical Process ◽  
Additive Technology ◽  
Selective Electron Beam Melting ◽  
Surface Microgeometry ◽  
Microstructure Of The Material

The results of the analysis of works related to the formation of surface microgeometry in the process of selective electron-beam melting are presented, and the physical model of this process is refined. The developing additive technology of selective electron-beam alloying and the directions in which its research is carried out, in particular, the analysis of the metallurgical process, the formation of the microstructure of the material, the formation of microstructure defects, are described. The roughness of the surface of products obtained by the SEBM technology, as well as the microgeometry of surfaces and the mechanisms of its formation, depending on various parameters of the process, are considered.

Solidification and Microstructural Control in Selective Electron Beam Melting of Co-29Cr-10Ni-7W Alloy

2018 ◽  
Vol 941 ◽  
pp. 902-907
Author(s):  
Minh A.L. Phan ◽  
Darren Fraser ◽  
Zhan W. Chen ◽  
Stefan Gulizia
Keyword(s):  
Electron Beam ◽  
Electron Beam Melting ◽  
Dendritic Growth ◽  
Hot Cracking ◽  
Hot Tearing ◽  
Carbide Phases ◽  
High Production Rate ◽  
Selective Electron Beam Melting ◽  
High Production ◽  
Manufacturing Techniques

Electron beam melting (EBM) has been among the most widely applied additive manufacturing techniques providing a high production rate, low residual stress and good mechanical properties of as-fabricated parts. In order for a wider industrial application of EBM, knowledge on alloy suitability for the process is important. In this work, EBM of Co-29Cr-10Ni-7W alloy is studied. During EBM, the alloy solidifies in a typical columnar-dendritic manner with multiple carbide phases formed in interdendritic regions and grain boundaries. Under the commonly used EBM conditions, cracks are readily observed in the EBM-fabricated state. In the present work, the forms of cracking are described and microstructure analysis has been conducted in order to suggest how cracks propagate during EBM. We will also discuss the possibility of controlling EBM operation to alter grain growth orientations and thus to reduce hot cracking. Keywords: melt pools; columnar dendritic growth; hot tearing; liquation cracking

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